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Exhibit 99 (b)
 FOURTH AMENDMENT
TO
AMENDED AND RESTATED CREDIT AGREEMENT
 FOURTH AMENDMENT TO AMENDED AND RESTATED CREDIT AGREEMENT Amendment Borrower Guarantor Guarantors Administrative
Agent
 W I T N E S S E T H:
 WHEREAS Credit Agreement
 WHEREAS
 NOW, THEREFORE
 Defined Terms Generally .
 Amendment to Section 1.01 of Credit Agreement (Defined Terms)
 Amendment to Section 5.01(a)of Credit Agreement (Annual Financial Statements)
 Amendment to Section 5.01(b)of Credit Agreement (Quarterly Financial Statements)




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2005 10K Delivery Date
 Amendment to Section 6.01(xxii) of Credit Agreement (Liens)
 Conditions to Effectiveness . Fourth Amendment Effective Date
 Miscellaneous .
     2




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[SIGNATURE PAGES TO FOLLOW]
 3




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IN WITNESS WHEREOF
 BORROWER:DELPHI CORPORATIONBy:
    
    /s/ JOHN D. SHEEHANName: John D. SheehanTitle:   Vice President and
Chief Restructuring OfficerGUARANTORS:ASEC MANUFACTURING
GENERAL PARTNERSHIP,a Delaware general partnershipBy:
    
    /s/ JOHN P. ARLEName: John P. ArleTitle:   TreasurerASEC SALES GENERAL PARTNERSHIP,a Delaware general partnershipBy:
    
    /s/ JOHN P. ARLEName: John P. ArleTitle:   TreasurerASPIRE, INC.,a Michigan corporationBy:
    
    /s/ JAMES P. WHITSONName: James P. WhitsonTitle:   Vice President




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DELCO ELECTRONIC OVERSEAS CORPORATION,a Delaware corporationBy:
    
    /s/ JOHN P. ARLEName: John P. ArleTitle:   Assistant TreasurerDELPHI AUTOMOTIVE SYSTEMS (HOLDING), INC.,a Delaware corporationBy:
    
    /s/ JOHN D. SHEEHANName: John D. SheehanTitle:   PresidentDELPHI AUTOMOTIVE SYSTEMS GLOBAL
(HOLDING), INC.,a Delaware corporationBy:
    
    /s/ JOHN D. SHEEHANName: John D. SheehanTitle:   PresidentDELPHI AUTOMOTIVE SYSTEMS HUMAN RESOURCES LLC,a Delaware limited liability companyBy:
    
    /s/ JOHN P. ARLEName: John P. ArleTitle:   Vice President & TreasurerDELPHI AUTOMOTIVE SYSTEMS
INTERNATIONAL, INC.,a Delaware corporationBy:
    
    /s/ JOHN P. ARLEName: John P. ArleTitle:   Treasurer




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DELPHI AUTOMOTIVE SYSTEMS KOREA, INC.,a Delaware corporationBy:
    
    /s/ JOHN P. ARLEName: John P.ArleTitle:   Chief Executive Officer & PresidentDELPHI AUTOMOTIVE SYSTEMS LLC,a Delaware limited liability companyBy:
    
    /s/ JOHN D. SHEEHANName: John D. SheehanTitle:   Vice President and Chief RestructuringOfficer; Chief Accounting Officer and ControllerDELPHI AUTOMOTIVE SYSTEMS OVERSEAS CORPORATION,a Delaware corporationBy:
    
    /s/ JOHN P. ARLEName: John P. ArleTitle:   TreasurerDELPHI AUTOMOTIVE SYSTEMS RISK MANAGEMENT CORP.,a Delaware corporationBy:
    
    /s/ JOHN D. SHEEHANName: John D. SheehanTitle:   Vice President & TreasurerDELPHI AUTOMOTIVE SYSTEMS SERVICES LLC,a Delaware limited liability companyBy:
    
    /s/ JOHN P. ARLEName: John P. ArleTitle:   Treasurer




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DELPHI AUTOMOTIVE SYSTEMS TENNESSEE, INC.,a Delaware corporationBy:
    
    /s/ JOHN P. ARLEName: John P. ArleTitle:    TreasurerDELPHI AUTOMOTIVE SYSTEMS THAILAND, INC.,a Delaware corporationBy:
    
    /s/ JOHN P. ARLEName: John P. ArleTitle:   TreasurerDELPHI CHINA LLC,a Delaware limited liability companyBy:
    
    /s/ JAMES P. WHITSONName: James P. WhitsonTitle:   Chief Tax OfficerDELPHI CONNECTION SYSTEMS,a California corporationBy:
    
    /s/ JOHN P. ARLEName: John P. ArleTitle:   TreasurerDELPHI DIESEL SYSTEMS CORP.,a Delaware corporationBy:
    
    /s/ JAMES P. WHITSONName: James P. WhitsonTitle:   Chief Tax Officer




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DELPHI ELECTRONICS (HOLDING) LLC,a Delaware limited liability companyBy:
    
    /s/ JOHN P. ARLEName: John P. ArleTitle:   Assistant TreasurerDELPHI FOREIGN SALES CORPORATION,a Virgin Islands corporationBy:
    
    /s/ JOHN D. SHEEHANName: John D. SheehanTitle:   ControllerDELPHI INTEGRATED SERVICE SOLUTIONS, INC.,a Michigan corporationBy:
    
    /s/ JAMES P. WHITSONName: James P. WhitsonTitle:   Vice PresidentDELPHI INTERNATIONAL HOLDINGS CORP.,a Delaware corporationBy:
    
    /s/ JOHN D. SHEEHANName: John D. SheehanTitle:   PresidentDELPHI INTERNATIONAL SERVICES, INC.,a Delaware corporationBy:
    
    /s/ JOHN P. ARLEName: John P. ArleTitle:   Chief Financial Officer & Treasurer




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DELPHI LIQUIDATION HOLDING COMPANY,a Delaware corporationBy:
    
    /s/ JOHN D. SHEEHANName: John D. SheehanTitle:   PresidentDELPHI LLC,a Delaware limited liability companyBy:
    
    /s/ JOHN D. SHEEHANName: John D. SheehanTitle:   PresidentDELPHI MECHATRONIC SYSTEMS, INC.,a Delaware corporationBy:
    
    /s/ JOHN P. ARLEName: John P. ArleTitle:   TreasurerDELPHI MEDICAL SYSTEMS COLORADO CORPORATION,a Colorado corporationBy:
    
    /s/ JOHN P. ARLEName: John P. ArleTitle:   Vice President & TreasurerDELPHI MEDICAL SYSTEMS CORPORATION,a Delaware corporationBy:
    
    /s/ JOHN P. ARLEName: John P. ArleTitle:   Vice President & Treasurer




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DELPHI MEDICAL
SYSTEMS TEXAS CORPORATION,a Delaware corporationBy:
    
    /s/ JOHN P. ARLEName: John P. ArleTitle:   Vice President & TreasurerDELPHI NY HOLDING CORPORATION,a New York corporationBy:
    
    /s/ JOHN D. SHEEHANName: John D. SheehanTitle:   PresidentDELPHI SERVICES HOLDING CORPORATION,a Delaware corporationBy:
    
    /s/ JOHN P. ARLEName: John P. ArleTitle:   TreasurerDELPHI TECHNOLOGIES, INC.,a Delaware corporationBy:
    
    /s/ THOMAS N. TWOMEYName: Thomas N. TwomeyTitle:   Vice President Intellectual PropertyDREAL, INC.,a Delaware corporationBy:
    
    /s/ JOHN A. JAFFURSName: John A. JaffursTitle:   President




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ENVIRONMENTAL CATALYSTS, LLC,a Delaware limited liability companyBy:
    
    /s/ JOSEPH P. GUMINAName: Joseph P. GuminaTitle:   TreasurerEXHAUST SYSTEMS CORPORATION,a Delaware corporationBy:
    
    /s/ JOHN P. ARLEName: John P. ArleTitle:   Assistant TreasurerPACKARD HUGHES
INTERCONNECT COMPANY,a Delaware corporationBy:
    
    /s/ JAMES P. WHITSONName: James P. WhitsonTitle:   Chief Tax OfficerSPECIALTY ELECTRONICS INTERNATIONALLTD.,a Virgin Islands corporationBy:
    
    /s/ MICHAEL T. REAGANName: Michael T. ReaganTitle:   Treasurer and SecretarySPECIALTY ELECTRONICS, INC.,a South Carolina corporationBy:
    
    /s/ JAMES P. WHITSONName: James P. WhitsonTitle:   Chief Tax Officer




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AGENTS AND LENDERS:JPMORGAN CHASE BANK, N.A.Individually and as Administrative AgentBy:
    
    /s/ GIANNI RUSSELLOName: Gianni RusselloTitle:   AssociateCITICORP USA, INC.By:
    
    /s/ JEFFREY NITZName: Jeffrey NitzTitle:   Director




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Signature page for the Fourth Amendment to Amended and Restated Credit
Agreement, dated as of June 19, 2006 among Delphi Corporation and the lenders
party theretoName of Lender:By:Name:Title: